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Hippopotamidae is a family of stout, naked-skinned, and semiaquatic artiodactyl mammals, possessing three-chambered stomachs and walking on four toes on each foot. While they resemble pigs physiologically, their closest living relatives are the cetaceans. They are sometimes referred to as hippopotamids. There … 展开
Hippopotamids are large mammals, with short, stumpy legs, and barrel-shaped bodies. They have large heads, with broad mouths, and nostrils … 展开
The systematics and taxonomy used here mostly follows a review by J.-R. Boisserie and the American Society of Mammalogists.
Recent species 展开The hippopotamids are descended from the anthracotheres, a family of semiaquatic and terrestrial artiodactyls that appeared in the late 展开
• "Hippopotamidae". Integrated Taxonomic Information System. Retrieved 11 August 2004.
• Petronio, C. … 展开CC-BY-SA 许可证中的维基百科文本 河马科 - 维基百科，自由的百科全书
网页河馬科（学名： Hippopotamidae ）是偶蹄目–凹齒下目的一個演化支，與鯨類互為姊妹群，现仅存2屬2種，即河马與倭河马，都產於撒哈拉以南非 …
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Hippopotamus - Wikipedia
The hippopotamus (Hippopotamus amphibius) (/ˌhɪpəˈpɒtəməs/; pl.: hippopotamuses; also shortened to hippo (pl.: hippos), further qualified as the common hippopotamus, Nile hippopotamus, or river hippopotamus, is a large semiaquatic mammal native to sub-Saharan Africa. It is one of only two extant species in the family Hippopotamidae, the other being the pygmy hippopotamus (Choeropsis …
Wikipedia · CC-BY-SA 许可下的文字Hippos stem from the longest sequence of terrestrial
网页2015年2月24日 · Here, the authors describe a new fossil from Kenya that unambiguously roots Hippopotamidae into the group that includes the first large terrestrial mammals to invade Africa, more than 30 million...
Size, Diet, Habitat, Evolution, & Images - Britannica
网页5 天之前 · The hippopotamus is a large, aquatic mammal native to Africa. Hippos are known for their massive size and unique adaptations for water life, though they face threats from human activities, which has led to a …
ADW: Hippopotamidae: INFORMATION
网页Learn about the two genera and two species of hippos, their physical features, behavior, diet, and distribution. Find references and literature cited for further reading on hippo diversity and evolution.
Characteristics and behavior of the hippopotamus
网页At night they go on land to feed on grasses, which they crop with their hard-edged lips. In water they can swim fast, walk along the bottom, and remain submerged (with ears and nostrils closed) for five minutes or more. The …
Hippopotamus | Species | WWF - World Wildlife Fund
网页Learn about the hippopotamus, the heaviest land animal after the elephant, and its habitat, diet, and threats. Find out how WWF is working to protect this vulnerable species and its ecosystem.
Hippopotamidae | mammal family | Britannica
网页Learn about hippopotamidae, the family of amphibious African ungulates that includes hippos and their extinct relatives. Find out their characteristics, behaviour, reproduction, …
